/*
 * Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Nam Nguyen
 */

package com.caucho.quercus.lib.reflection;

import com.caucho.quercus.QuercusException;
import com.caucho.quercus.UnimplementedException;
import com.caucho.quercus.annotation.Optional;
import com.caucho.quercus.env.ArrayValue;
import com.caucho.quercus.env.ArrayValueImpl;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.ObjectValue;
import com.caucho.quercus.env.QuercusClass;
import com.caucho.quercus.env.Value;
import com.caucho.quercus.env.StringValue;
import com.caucho.quercus.function.AbstractFunction;
import com.caucho.quercus.program.Arg;
import com.caucho.quercus.program.ClassDef;
import com.caucho.util.L10N;

public class ReflectionMethod extends ReflectionFunctionAbstract
  implements Reflector
{
  private static final L10N L = new L10N(ReflectionMethod.class);
  
  public static final int IS_STATIC = 1;
  public static final int IS_ABSTRACT = 2;
  public static final int IS_FINAL = 4;
  
  public static final int IS_PUBLIC = 256;
  public static final int IS_PROTECTED = 512;
  public static final int IS_PRIVATE = 1024;
  
  private String _clsName;
  
  protected ReflectionMethod(AbstractFunction method)
  {
    super(method);
  }
  
  protected ReflectionMethod(String clsName, AbstractFunction method)
  {
    super(method);
    
    _clsName = clsName;
  }
  
  public static ReflectionMethod __construct(
      Env env, Value obj, StringValue name)
  {
    String clsName;
    
    if (obj.isObject())
      clsName = obj.getClassName();
    else
      clsName = obj.toString();
    
    return new ReflectionMethod(
        clsName, env.getClass(clsName).getFunction(name));
  }
  
  public static String export(Env env,
                              Value cls,
                              String name,
                              @Optional boolean isReturn)
  {
    return null;
  }
  
  public Value invoke(Env env, ObjectValue object, Value []args)
  {
    return getFunction().callMethod(
        env, object.getQuercusClass(), object, args);
  }
  
  public Value invokeArgs(Env env, ObjectValue object, ArrayValue args)
  {
    return getFunction().callMethod(env, object.getQuercusClass(), object, 
                                    args.getValueArray(env));
  }
  
  public boolean isFinal()
  {
    return getFunction().isFinal();
  }
  
  public boolean isAbstract()
  {
    return getFunction().isAbstract();
  }
  
  public boolean isPublic()
  {
    return getFunction().isPublic();
  }
  
  public boolean isPrivate()
  {
    throw new UnimplementedException("isPrivate()");
  }
  
  public boolean isProtected()
  {
    return getFunction().isProtected();
  }
  
  public boolean isStatic()
  {
    return getFunction().isStatic();
  }
  
  public boolean isConstructor()
  {
    return false;
  }
  
  public boolean isDestructor()
  {
    return false;
  }
  
  public int getModifiers()
  {
    int flag = 1024 * 64; //2^6, some out-of-the-blue number?
    
    if (isProtected())
      flag |= IS_PROTECTED;
    //else if (isPrivate())
      //flag |= IS_PRIVATE;
    else if (isPublic())
      flag |= IS_PUBLIC;

    if (isFinal())
      flag |= IS_FINAL;
    if (isAbstract())
      flag |= IS_ABSTRACT;
    if (isStatic())
      flag |= IS_STATIC;
    
    return flag;
  }
  
  public ReflectionClass getDeclaringClass(Env env)
  {
    String clsName = getFunction().getDeclaringClassName();
    
    if (clsName == null)
      throw new QuercusException(
          L.l("class name is null {0}: {1}",
              getFunction(), getFunction().getClass()));

    return new ReflectionClass(env, clsName);
  }
  
  @Override
  public ArrayValue getParameters(Env env)
  {
    ArrayValue array = new ArrayValueImpl();
    
    AbstractFunction fun = getFunction();
    Arg []args = fun.getArgs();
    
    for (int i = 0; i < args.length; i++) {
      array.put(env.wrapJava(new ReflectionParameter(_clsName, fun, args[i])));
    }
    
    return array;
  }
  
  public String toString()
  {
    String name;
    
    if (_clsName != null)
      name = _clsName + "->" + getName();
    else
      name = getName();

    return "ReflectionMethod[" + name + "]";
  }
}
